To convert images into raster (bitmap) form for display or printing. Vector graphics, and vector and outline fonts must be rasterized for printing or display; all output of a display screen or printer is in raster format.
rational number
A real number that can be expressed as the quotient of an integer divided by a nonzero integer.
real number
Any rational or irrational number; a number that corresponds to a point on a number line.
raw data
Unprocessed data.
raw mode
A mode that allows a computer to input or output raw data.
R:BASE
A relational DBMS from Microrim, Inc., Bellevue, Washington.
ray tracing
Using the computer to create a realistic graphic image by calculating the paths taken by rays of light hitting the object from various angles, thus creating reflections and shadows which give the image a three-dimensional look.
Regional Bell Operating Company
(RBOC). One of seven regional telephone companies created by the divestiture of AT&T in 1984. Each of them owns two or more local telephone companies called Bell Operating Companies (BOCs). The original RBOCs were Ameritech, Bell Atlantic, BellSouth, Nynex, Pacific Telesis, SBC Communications, and U.S. West. Later SBC Communications became Southwestern Bell.
RBOC
Regional Bell Operating Company. One of seven regional telephone companies created by the divestiture of AT&T in 1984. Each of them owns two or more local telephone companies called Bell Operating Companies (BOCs). The original RBOCs were Ameritech, Bell Atlantic, BellSouth, Nynex, Pacific Telesis, SBC Communications, and U.S. West. Later SBC Communications became Southwestern Bell.
rcp
Remote copy. A UNIX utility that copies files over an Ethernet.
Explanation : Databases normalization is a process that eliminates redundancy, organizes data efficiently, reduces the potential for anomalies during data operations and improves data consistency. The formal classifications used for quantifying "how normalized" a relational database is are called normal forms. A non-normalized database is vulnerable to data anomalies because it stores data redundantly. If data is stored in two locations, but later is updated in only one of the locations, then the data is inconsistent; this is referred to as an "update anomaly". A normalized database stores non-primary key data in only one location.
